Describe the bug
The total rail button mass and CG does not appear to be bothered at all by how many instances the rail buttons has.

To Reproduce

1. Open a new design
2. Add a body tube
3. Add a rail button to the body tube
4. (Change the density of the rail button to a high value so you're sure the CG and mass should update)
5. Change the instances of the rail button

Expected behavior
You would expect the mass and CG to change.

Screenshots

Platform

• OS: macOS
• OpenRocket version 22.02
• Graphics card (if a graphics or display-related problem) idk, ask Apple

Additional context
No context, but here is a haiku:
Java, oh Java,
Stuck in the past, so slow, yet
Legacy lingers.